Improvement in paper bags



a UNITED STATES LUTHER Ol. CROWELL, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN PAPER BAGS.

Specification forming part of Letters Patent No.` 146,435, dated January 13, 1874; application filed December l1, 1873.

To all whom it may concern:

Beit known that I, LUTHER C. CEowELL, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Paper Bag 5 and I do hereby declare that the following, taken in connection with the drawings which accompany and form a part of this specification, is a description of my invention sufficient to enable those skilled in the art to practice it.

My invention relates to a new construction of a paper bag as an article of manufacture, in which construction I use for the bag a strip of paper of twice the length of the ba-g, at each of. the opposite side edges of which paper is formed a narrow fold. The strip being folded at its center, one-half of the length of each of said side folds is folded against the other half, and by applying` cement to one 0r both of the two surfaces thuscoming together at the respective sides of the bag `they adhere. If this were the only treatment the result would be an inwardly-extending and 'objectionable fin-like projection. To oba viate this, one of the edge foldsof the bag,

or, rather,onehalf. of the edge fold of the strip, has paste applied to both sides of it, so

that it adheres to the side of the bag, and as the other half of the edge fold, when brought into Contact with the first, adheres to it the resul-t is a bag formed with an unseamed bottom, and with seams at its opposite edges,

y each sea-1n being formed by two inwardlyextending narrow folds connected together and; t0 one side, and one side only, of the inner surface of the ba-g. To form a square-bottomed bag, the same construction is followed, but a wide fold is also made at each edge of the paper, the narrow fold being turned outward or reversely to the wide fold, the two narrow folds at each side (made two folds by doubling the paper at the center) being ceinented face to face, and one fold at each side being also cemented to the adjacent surface of the paper, so that there 'is no salient pr0jection.

My invention consists in a bag thus formed or a paper bag having an unseamed bottom y and seamed side edges, each seambein g formed folded at the center of its length the edge fold constitutes the two edge folds'a b. Before the center fold is made half of the fold, or of the edge part to be folded, has paste applied toits inner surface, so Athat when folded at the center there are two folds, a b, one with and one without cement applied to its inner surface, so that the cement-applied fold a adheres to the surface o, against which it is folded, while the other kfold b is free from the surface d. Cement being also applied to the surfaces of the two folds that are tomeet, (or

to either of such surfaces,) they also adhere, and the result is the united folds a b'joined together, and together joined to the surface o, i

leaving an open bag from point w to point x, or from one extreme edge of the bag to the opposite one.

At Fig. 2 the Wide folds e are made in addition to the narrow folds, the narrow folds then turning outwardly, and being cemented together, and also to one, and to one only, of the adjacent surfaces of the wide folds.

Fig. 3 shows the bag in side view, the paper,

in forming the bag length embraced by the full and dotted lines, being folded on the center line z z to make the bottom.

I claim- A paper bag which, having a bottom made by a central transverse fold of the paper, has its sides closed by edge folds, which, at each side of the paper, are cemented together and to one of the adjacent surfaces of the bag, sub stantially as described.

LUTHER C. OROWELL.

Witnesses:

Farmers GoULn, y M. W. FROTHINGHAM. f 

